Abstract

A future intelligent tire application may require the tracking of damage accrual based upon the actual lived experiences of a tire. This work demonstrates such an application using commercial, off-the-shelf tools: the Simpack multibody dynamics code, the Abaqus finite element solver, and the Endurica EIE and DT fatigue solvers. Nurburgring circuit vehicle events for laps on 4 P225/35R20 tires were simulated via multibody dynamics. For each of the 4 tires, 3 corner channels (slip angle, slip ratio, vertical tire load) were computed and recorded for 13 miles over 8 minutes at a data acquisition rate of ~250 Hz. Damage in the tire was accrued on a finite element mesh via Endurica DT, using strain history that was interpolated via Endurica EIE for each time step of event history. The interpolation grid, or map, was pre-computed in Abaqus using steady-state rolling simulation results over the range of -15° to +15° in slip angle, -25% to 25% in longitudinal slip ratio and 0.5x to 1.5x TRA in tire load. The simulation shows how differences in actual lived tire experience vary from one vehicle corner to another, and within the tire cross section, and demonstrates the feasibility and requirements for live tracking of damage accrual.

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Presenter Bio - Thomas Ebbot

Tom received his PhD from the University of Wisconsin with a research topic of fracture and crack growth in polymers. He is a tire industry veteran known for his leadership in driving advances in modeling, simulation and workflows across a global organization.  He joined Endurica in 2022 after a 35-year career at Goodyear. While at Goodyear, he held various technical and leadership positions with experience in product development, modeling and simulation, and materials characterization. He was a major contributor to multiple technical partnerships. He also enjoyed a two-year assignment at Goodyear’s technical center in Luxembourg as the Manager of Computational Mechanics. He has published many technical papers and received numerous awards.